sed -i 's/representation(/slot=c(' *.R closes #58
this commit also updates collate list by introducing some additional @includes directives.
p.s. No idea why R has decided to depricate the most common way of defining S4 classes,
even Hadley's guides still show the use fo the S-compatible 'representation': http://adv-r.had.co.nz/S4.html